My Wife wanted a computer to play WOW Classic, and only gave me a budget of $350 CDN.
(I went a little over, shh... don't tell her.)
The case, CPU, Motherboard, ram, fans, and hub are new. The rest of the pieces are parts I had lying around the house.
It plays the game between 35 and 60 fps.
After about an hour of an AIDA64 stress test it doesn't exceed 55°C.
Overall she is very happy with the result.